摘要
本研究通过实际水样比对法验证了朗石COD自动在线监测仪在感潮河段(高氯水体)的适用性,并在此基础上,以深圳河感潮河段为研究对象,分析化学需氧量(COD)的变化规律及其与环境因素的关系。研究表明,COD自动在线监测仪的准确度(平均相对误差<10%)和精密度(平均相对标准偏差<5%)较好,可有效消除氯离子的干扰,同时与手工方法——氯气校正法具有可比性,可准确监测感潮河段高氯水体中的COD浓度。感潮河段的观测中,COD浓度范围为6.85~17.74 mg/L,与溶解氧、温度、潮位和浊度等环境因子呈显著相关关系(p<0.001),提示在后续河口及近海岸区的COD监测中应考虑环境因子的影响。本研究为高氯水体的COD在线监测提供数据支撑,对保障水质安全、提升感潮河段环境监管水平有重要意义。
In this study,it was proved that the practicability of COD online analyzer in high chlorine-containing water by water sample controlled-experiment in laboratory.Meanwhile,basing on the experimental result of COD online analyzer performances,it applied to analyzing the relationship of the concentration variation of chemical oxygen demand(COD)and environmental factors in the tidal reach of Shenzhen River.It was testified that there was no significant discrepancy between the manual analysis method(Chlorine emendation method)and COD online analyzer,which was trial applicability with high accuracy(Relative standard deviation<10%)and precision(Relative error<5%).In the observations of the environmental factors such as dissolved oxygen,temperature,tide level and turbidity had significant negative correlation(p<0.001)with the concentration periods of COD(6.85-17.74 mg/L),therefore it should be considered that the suggesting that the influence of environmental factor has impact with the COD monitoring of estuaries and coastal areas.This experiment provides data support for online monitoring of COD in high chlorine-containing water,and is of great significance to ensure water quality safety and improve the environmental supervision level.
作者
罗澍
蒋珊
严百平
张伟政
Luo Shu;Jiang Shan;Yan Baiping;Zhang Weizheng(Shenzhen Environmental Monitoring Center Station,Shenzhen Guangdong 518000,China;Shenzhen Labsun Scientific Instrument Co.,Ltd,Shenzhen Guangdong 518000,China)
出处
《环境与发展》
2022年第7期39-46,共8页
Environment & Development
关键词
化学需氧量
高氯水体
在线监测
环境因素
感潮河段
深圳河
Chemical oxygen demand
High chlorine-containing water
Online monitoring
Environmental factors
Tidal reach
Shenzhen River
